main.c

该程序为PIC单片机定时器2的验证程序

#include<pic.h>

unsigned int  SecondCount;
unsigned char LEDCount;


const unsigned char LEDCODE[]=
{
	0x3f,0x06,0x5b,0x4f,0x66,
	0x6d,0x7d,0x07,0x7f,0x6f,
	0x77,0x7c,0x39,0x5e,0x79,
	0x71,
};

void main(void)
{
	TRISD=0;
	TRISE=0;
	//Timer2时钟的分频选择位
	T2CKPS1=1;
	T2CKPS0=1;

	//1:1后分频比
	TOUTPS3=0;
	TOUTPS2=0;
	TOUTPS1=0;
	TOUTPS0=0;

	TMR2=0;

	TMR2IF=0;
	TMR2IE=1;
	PEIE=1;
	GIE =1;
	
	TMR2ON=1;//开启TMR2的工作,定时器2的使能位
	while(1)
	{
		;
	}	
}

void interrupt pic(void)
{
	if(TMR2IF==1)
	{
		TMR2IF=0;
		TMR2  =0;
		
		SecondCount++;
		if(SecondCount==500)		
		{
			SecondCount=0;
			PORTD=LEDCODE[LEDCount];
			LEDCount++;
			if(LEDCount==16)LEDCount=0;

		}
	}
}